Improvement in scroll-saws



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GOUVERNEUR- M; NroiiAsoN, or VnLLnNvILLnNew YORK.

11mm Patem1v0.1oo,551,daad Mmh e, 1870.

IMPROVEMEIT IN SCROLL-SWS/ The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern i Be it known that I, GoUvERNEUR M. NIcKAsoN, of Ellenville, in the county of Ulster, and State of New York, have invented a new and improved Scroll Sawing Machine; and I do hereby declare that the following is a full, clear, and Aexact descliption thereof; which will enable others skilled iu the art to make and use the same, reference being had to the accompanying drawings forming part of this specification, in whichf- Figure 1 represents a side elevation, partly in section, of my improved scroll-saw, Y vFigure 2 isa front elevation of' the same.

Similar letters of reference indicate corresponding parts.

. My invention relates to improvements in scrollsaws, and

- The invention consists in the construction, combinaion, and arrangement of parts,as hereinafter' speciiie Y i A, inthe drawing, represents the saw-table or bed, supported on suitable legsor posts. y

B is' thelupper frame or guide, suspended from suit- Vable stationary devices. L On the face ofthe gnideB 'are one' or' ,two grooves `or projecting ribs a. a, between which a verticallyadjustable slotted plate, 0, can be moved up and down.

The plate O can be fastened in any suitable position by means of alscrew and nut, b, or its equivalent. v r

The guide Bmay, 'instead of thev plate 0, be slotted,v to allow the up and down adjustment of the latter. i

The face of thefplate C has one or two guide-ribs or grooves, c c, to retain and hold a; vertically-adjustable plate, D, which is, by means of an adjustable strap, E, suspended. from a strong spring, F, that isi'astned 'to the frame B, and that tends to draw the plate D up. Y

'Thevupper endofthe plate D isv drawn by the spring against a pivoted stop, d, fastened to the plate C, as shown.

The upper end of thesaw-blade G, is, by a screw,

e, fastened vto lugs, ff, that project from the-slide D. The lower end ot the saw-blade is, in asimilar manner, fastened 'to -a short block,.H, which is, by a pin, g, pivoted. to the endof an operating-treadle or pitmau, I. y

4 On `the lower end of theslide O is formed a presser- The slide O is, before operation is commenced, let

down upon the stuff to be sawed, and is then clamped by the screw b.

Motion is then imparted vto the saw, as on thinner stuff, the slide O is brought lower down, its stop d is' also lowered, and the motion of the saw consequently reduced.

The spring F draws the saw up after eacbstroke. Its power can be regulated by lengthening or shortening the strap E.

vWhen 4the` saw is not nsed,fthe. stop rl is swung .as ifle, so that the spring will elevate the slide D as much as possible, to prevent useless straining of the said spring.

By unfastening the upper end of the saw-blade,the.

said block can be freely turned on the pivot g, and its inclination can thereby at will be varied.

The saw can be taken hold of when desired, without any injury to it.

` The spring is a very essential part ofthe invention. By the use of this spring, the peculiar form and application of the same, the power is imparted to the sawdirect, and without any possible friction, at the same time increasing the speed considerably, while it is freed from all strain or tension.

When the presser-foot is to be moved up or down,

'it is only necessary to loosen the top end of the saw", and to then pass the presser-foot in any direction, and the saw stands still, so that by the application vof the lugs and the set-screw, the saw can be taken hold of where desired.

By the combinationoftthe slides -with the presser-fogt, no more saw is used than is necessary to do the work, thereby increasing the power of the saw. 1

In case the saw is to be changed orlliled, 'it can'- always be done without touching any part of the machine, save turning back the two set-screws that hold the saw in place.

The spring holds the slide-plate lrmly against the stop, and the stop prevents the spring drawing Athe slide-plate D from the slides C.

When the machine is not in use, the strap is detached at the lower end, the slide then stands on the saw,`and the spring is relieved.

The strap that operatesl the spring is calculated to take up and let out, to regulate-the strain of the s aw, according to circumstances.

f The object of the hinge or pivot at the bottom of the saw-blade is to allow the top of the sawto pass forward and back, for the purpose of slipping the top end through a hole to the inside, for inside cutting.

Havingtthus described my invention, What I claim as new, and desire to secure by Letters Patent, 'is-- l. The stop d, pivoted to the slide O, and arranged to regulate the movement of the saw.-or slide D, in .l

combination with the spring F, plate D, and strap E, all constructed and arranged to operate as shown and described.

2. The slotted slide C, adjustable in guides a, by means of the' screw-bolt b and nut, and provided with the presser-foot h,v the upper slide D, stop d, adjustable strap E, and spring F, allgconstructed, arranged,

and operating inthe manner set forth.

G. M. NICKASON.

Witnesses: FRANK CLARK, J ons B. Mason. 

